fix segfault
fix segfault

Original commit message from CVS:
fix segfault

shelsonjava/gstreamer,ensonic/gstreamer,Lachann/gstreamer,magcius/gstreamer,StreamUtils/gstreamer,drothlis/gstreamer,ylatuya/gstreamer,centricular/gstreamer,collects/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,Lachann/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,collects/gstreamer,krichter722/gstreamer,mparis/gstreamer,ensonic/gstreamer,drothlis/gstreamer,mrchapp/gstreamer,Distrotech/gstreamer,ylatuya/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,mrchapp/gstreamer,jpxiong/gstreamer,mparis/gstreamer,centricular/gstreamer,ahmedammar/platform_external_gst_gstreamer,cfoch/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,ahmedammar/platform_external_gst_gstreamer,Lachann/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,magcius/gstreamer,krichter722/gstreamer,ylatuya/gstreamer,justinjoy/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpakkane/gstreamer,ylatuya/gstreamer,drothlis/gstreamer,justinjoy/gstreamer,Distrotech/gstreamer,ensonic/gstreamer,Distrotech/gstreamer,surround-io/gstreamer,Lachann/gstreamer,cfoch/gstreamer,shelsonjava/gstreamer,magcius/gstreamer,magcius/gstreamer,Distrotech/gstreamer,surround-io/gstreamer,krichter722/gstreamer,ensonic/gstreamer,cfoch/gstreamer,collects/gstreamer,collects/gstreamer,centricular/gstreamer,lubosz/gstreamer,centricular/gstreamer,jpakkane/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,lovebug356/gstreamer,centricular/gstreamer,drothlis/gstreamer,ensonic/gstreamer,ahmedammar/platform_external_gst_gstreamer,krieger-od/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,cfoch/gstreamer,Distrotech/gstreamer,mrchapp/gstreamer,mrchapp/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,ylatuya/gstreamer,collects/gstreamer,mrchapp/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,surround-io/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,mparis/gstreamer,justinjoy/gstreamer,cfoch/gstreamer,drothlis/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpakkane/gstreamer,magcius/gstreamer,krieger-od/gstreamer,krieger-od/gstreamer,lubosz/gstreamer